Auto-update using Sparkle

Hi
I'm developing a plugin for AfterEffects, which will be uploaded on FxFactory as well as an external site.
For the external site, I'm implementing auto-update using Sparkle framework. 
I understand that my plugin bundle is different from the host bundle, i.e. AfterEffects.
However, I was able to implement auto update for my plugin using the below code in my GlobalSetup:

PlaceHolderClass *placeholder = [[PlaceHolderClass alloc] init];

SUUpdater *updater = [SUUpdater updaterForBundle:[NSBundle bundleForClass:[placeholder class]]];

[updater checkForUpdates:nil];

But once the update build is downloaded, next task is extracting and while extracting it crashes and gives the error:

Assertion failed: (auxiliaryToolURL != nil), function -[SUInstallerLauncher pathForBundledTool:extension:fromBundle:], file SUInstallerLauncher.m, line 329.

Please help